// Wokwi ESP32 DevKitC V4 Board
// Relay Module connected to GPIO 26
// LED connected to GPIO 27 with a 220 ohm resistor

#include <WiFi.h>
#include <WiFiClient.h>
#include <UniversalTelegramBot.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Telegram Bot token
const char* botToken = "7057686957:AAGPfJcK_7uJbo4vupF6tlR5vCf_tPJnEqc";

WiFiClient client;
UniversalTelegramBot bot(botToken, client);

const int relayPin = 26;  // Relay Module connected to GPIO 26
const int ledPin = 27;   // LED connected to GPIO 27

void setup() {
  Serial.begin(115200);

  // Initialize WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status()!= WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  Serial.println("Initializing Telegram Bot...");

  // Initialize Telegram Bot
  bot.sendMessage("Wokwi ESP32 DevKitC V4", "Bot started!");

  // Initialize Relay and LED pins as outputs
  pinMode(relayPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int numNewMessages = bot.getUpdates(bot.last_message_received + 1);

  while (numNewMessages) {
    Serial.println("Received message");
    String chat_id = String(bot.messages[0].chat_id);
    String text = bot.messages[0].text;

    if (text == "/turn_on") {
      digitalWrite(relayPin, HIGH);
      digitalWrite(ledPin, HIGH);
      bot.sendMessage(chat_id, "Turned on!");
    } else if (text == "/turn_off") {
      digitalWrite(relayPin, LOW);
      digitalWrite(ledPin, LOW);
      bot.sendMessage(chat_id, "Turned off!");
    }

    numNewMessages = bot.getUpdates(bot.last_message_received + 1);
  }
}